@article {293, title = {Application of atomic magnetometry in magnetic particle detection}, journal = {Applied Physics Letters}, volume = {89}, year = {2006}, note = {Appl Phys Lett112PJTimes Cited:9Cited References Count:18}, month = {Nov 27}, abstract = {

The authors demonstrate the detection of magnetic particles carried by water in a continuous flow using an atomic magnetic gradiometer. Studies on three types of magnetic particles are presented: a single cobalt particle (diameter similar to 150 mu m, multidomain), a suspension of superparamagnetic magnetite particles (diameter similar to 1 mu m), and ferromagnetic cobalt nanoparticles (diameter similar to 10 nm). Estimated detection limits are 20 mu m diameter for a single cobalt particle at a water flow rate of 30 ml/min, 5x10(3) magnetite particles at 160 ml/min, and 50 pl for the ferromagnetic fluid of cobalt nanoparticles at 130 ml/min. Possible applications of their method are discussed.

}, keywords = {system}, isbn = {0003-6951}, doi = {Doi 10.1063/1.2400077}, url = {://WOS:000242538500151}, author = {Xu, S. and Donaldson, M. H. and Pines, A. and Rochester, S. M. and Budker, D. and Yashchuk, V. V.} } @article {304, title = {Auxiliary probe design adaptable to existing probes for remote detection NMR, MRI, and time-of-flight tracing}, journal = {Journal of Magnetic Resonance}, volume = {182}, year = {2006}, note = {J Magn Reson093XPTimes Cited:7Cited References Count:21}, month = {Oct}, pages = {260-272}, abstract = {

A versatile, detection-only probe design is presented that can be adapted to any existing NMR or MRI probe with the purpose of making the remote detection concept generally applicable. Remote detection suggests freeing the NMR experiment from the confinement of using the same radio frequency (RF) coil and magnetic field for both information encoding and signal detection. Information is stored during the encoding step onto a fluid sensor medium whose magnetization is later measured in a different location. The choice of an RF probe and magnetic field for encoding can be made based solely on the size and characteristics of the sample and the desired information quality without considering detection sensitivity, as this aspect is dealt with by a separate detector. While early experiments required building probes that included two resonant circuits, one for encoding and one for detection, a modular approach with a detection-only probe as presented here can be used along with any existing NMR probe of choice for encoding. The design of two different detection-only probes is presented, one with a saddle coil for milliliter-sized detection volumes, and the other one with a microsolenoid coil for sub-microliter fluid quantities. As example applications, we present time-of-flight (TOF) tracing of hyperpolarized Xe-129 spins in a gas mixture through coiled tubing using the microsolenoid coil detector and TOF flow imaging through a nested glass container where the gas flow changes its direction twice between inlet and outlet using the saddle coil detector. (c) 2006 Elsevier Inc. All rights reserved.

}, keywords = {flow}, isbn = {1090-7807}, doi = {Doi 10.1016/J.Jmr.2006.06.024}, url = {://WOS:000241203900010}, author = {Han, S. I. and Granwehr, J. and Garcia, S. and McDonnell, E. E. and Pines, A.} } @article {328, title = {Advances in ex-situ Nuclear Magnetic Resonance}, journal = {Comptes Rendus Physique}, volume = {5}, year = {2004}, note = {Cr Phys843JCTimes Cited:13Cited References Count:47}, month = {Apr}, pages = {337-347}, abstract = {

Nuclear Magnetic Resonance has revolutionized modern science by its precision, selectivity and non-envasiveness. From complicated biomolecules to materials, from living organisms to nanometric particles, Magnetic Resonance Imaging and Spectroscopy have provided a wealth of invaluable information. Those studies take place in the laboratory, since they require strong and extremely homogeneous superconducting magnets and this represents a major limitation for the technique. Furthermore, the size of the object or subject to study is limited since it has to fit inside the bore of the magnet. Efforts to alleviate those problems lead to the recent development of portable magnetic resonance systems. Their use remained, however, mainly qualitative, since spectroscopic information could not be recovered. We have introduced recently an approach to regain this lost spectral information even in the presence of inhomogeneous magnetic fields. Our approach is based on the matching between the effect of the radio-frequency field and the effect of the static magnetic field. Several practical implementations will be reviewed and put in perspective for their applicability and efficiency in ex-situ NMR. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved.

}, keywords = {in-vivo}, isbn = {1631-0705}, doi = {Doi 10.1016/J.Crhy.2004.03.016}, url = {://WOS:000223073800006}, author = {Sakellariou, D. and Meriles, C. A. and Pines, A.} } @article {340, title = {Amplification of xenon NMR and MRI by remote detection}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {100}, year = {2003}, note = {P Natl Acad Sci USA709HPTimes Cited:65Cited References Count:28}, month = {Aug 5}, pages = {9122-9127}, abstract = {

A technique is proposed in which an NMR spectrum or MRI is encoded and stored as spin polarization and is then moved to a different physical location to be detected. Remote detection allows the separate optimization of the encoding and detection steps, permitting the independent choice of experimental conditions and excitation and detection methodologies. In the initial experimental demonstration of this technique, we show that taking dilute Xe-129 from a porous sample placed inside a large encoding coil and concentrating it into a smaller detection coil can amplify NMR signal. In general, the study of NMR active molecules at low concentration that have low physical filling factor is facilitated by remote detection. In the second experimental demonstration, MRI information encoded in a very low-field magnet (4-7 mT) is transferred to a high-field magnet (4.2 T) to be detected under optimized conditions. Furthermore, remote detection allows the utilization of ultrasensitive optical or superconducting quantum interference device detection techniques, which broadens the horizon of NMR experimentation.

}, keywords = {field}, isbn = {0027-8424}, doi = {Doi 10.1073/Pnas.1133497100}, url = {://WOS:000184620000007}, author = {Moule, A. J. and Spence, M. M. and Han, S. I. and Seeley, J. A. and Pierce, K. L. and Saxena, S. and Pines, A.} } @article {343, title = {Applications of Laser-Polarized 129 XE NMR to Biomolecular Assays}, journal = {Magnetic Resonance Imaging}, year = {2003}, pages = {1235-1239}, doi = {10.1016/J.Mri.2003.08.025}, author = {Lowery, T.J. and Rubin, S.M. and Ruiz, E.J. and Spence, M.M. and Winssinger, N. and Schultz, P.G. and Pines, A. and Wemmer, D.E.} } @article {369, title = {Approach to high-resolution ex situ NMR spectroscopy}, journal = {Science}, volume = {293}, year = {2001}, note = {Science451BBTimes Cited:109Cited References Count:20}, month = {Jul 6}, pages = {82-85}, abstract = {

Nuclear magnetic resonance (NMR) experiments are typically performed with samples immersed in a magnet shimmed to high homogeneity. However, there are many circumstances in which it is impractical or undesirable to insert objects or subjects into the bore of a high-field magnet. Here we present a methodology based on an adaptation of nutation echoes that provides resolved spectra in the presence of matched inhomogeneous static and radiofrequency fields, thereby opening the way to high-resolution exsitu NMR, The observation of chemical shifts is regained through the use of multiple-pulse sequences of correlated, composite z-rotation pulses, producing resolved NMR spectra of liquid samples.

}, keywords = {echoes}, isbn = {0036-8075}, doi = {Doi 10.1126/Science.1061498}, url = {://WOS:000169780300032}, author = {Meriles, C. A. and Sakellariou, D. and Heise, H. and Moule, A. J. and Pines, A.} } @article {428, title = {Application of rotational resonance to inhomogeneously broadened systems}, journal = {Chemical Physics Letters}, volume = {251}, year = {1996}, note = {Chem Phys LettUd924Times Cited:17Cited References Count:28}, month = {Mar 22}, pages = {223-229}, abstract = {

A protocol is presented for the determination of internuclear distances using rotational-resonance magnetization-exchange NMR in systems with inhomogeneously broadened lines. Non-linear least-square fitting procedures are used to obtain the distance, the inhomogeneous broadening, the zero-quantum relaxation time, and error estimates for these parameters. We apply this procedure to a biological system of unknown structure.

}, keywords = {nmr}, isbn = {0009-2614}, doi = {Doi 10.1016/0009-2614(96)00098-X}, url = {://WOS:A1996UD92400015}, author = {Heller, J. and Larsen, R. and Ernst, M. and Kolbert, A. C. and Baldwin, M. and Prusiner, S. B. and Wemmer, D. E. and Pines, A.} } @article {443, title = {Adsorption Properties of Porous Silicon Characterized by Optically Enhanced Xe-129 Nmr-Spectroscopy}, journal = {Surface Science}, volume = {334}, year = {1995}, note = {Surf SciRk973Times Cited:31Cited References Count:33}, month = {Jul 10}, pages = {L730-L734}, abstract = {

Highly spin polarized xenon is used to study the adsorption properties of porous silicon surfaces by Xe-129 NMR spectroscopy. The sensitivity enhancement through optical pumping allows the NMR characterization of small amounts of physisorbed xenon in a pressure regime typical for adsorption isotherms. Fully hydrogen terminated porous silicon, porous silicon with an increased number of dangling bonds and porous silicon after methanol adsorption are characterized by the adsorbed Xe-129 NMR lineshape, chemical shift and relaxation behavior.

}, keywords = {field}, isbn = {0039-6028}, doi = {Doi 10.1016/0039-6028(95)80024-7}, url = {://WOS:A1995RK97300007}, author = {Pietrass, T. and Bifone, A. and Pines, A.} } @article {472, title = {An Approximate Method of Side-Band Intensity Calculation in Magic-Angle-Spinning Nmr}, journal = {Applied Magnetic Resonance}, volume = {5}, year = {1993}, note = {Appl Magn ResonLv192Times Cited:2Cited References Count:19}, pages = {43-61}, abstract = {

A theory of sideband intensity is derived by expanding into a Taylor series the free induction decay observed under magic angle spinning (MAS). According to this procedure, the free induction decay signal is completely represented by a basis of irreducible tensors from rank zero to rank infinity. After averaging over all orientations, only the zero-order irreducible tensors contribute to the sideband intensities. Symmetry properties of the sidebands can be seen clearly in this expansion, and an approximate formula up to ninth order is obtained by truncating the series. Sideband intensities can be calculated rapidly with this formula. The results agree satisfactorily with the exact sideband intensities obtained by numerical simulation if the ratio of the anisotropy to the spinning speed, omega0delta/omega(r), is smaller than 3. The relationship of the sideband intensities with the moments of a MAS spectrum shows that the proposed method is an alternative to moment analysis when the spinning speed is not very slow. Anisotropic information about the chemical shift anisotropy interaction therefore can be extracted efficiently from experimental spectra by this approximate method.

}, keywords = {nuclei}, isbn = {0937-9347}, url = {://WOS:A1993LV19200006}, author = {Sun, B. Q. and Pines, A.} } @article {494, title = {Adsorption Effects in Aluminophosphate Molecular-Sieves Studied by Al-27 Double-Rotation Nmr}, journal = {Catalysis Letters}, volume = {15}, year = {1992}, note = {Catal LettJj259Times Cited:18Cited References Count:17}, pages = {65-73}, abstract = {

Al-27 double rotation NMR (DOR) spectroscopy is used to investigate structural changes in the framework of several aluminophosphate molecular sieves upon adsorption of water. The shapes, widths, and positions of the spectral lines yield information on the aluminum environments, adsorption sites, and degree of structural disorder undergone upon water adsorption.

}, keywords = {alpo4-8}, isbn = {1011-372X}, doi = {Doi 10.1007/Bf00770899}, url = {://WOS:A1992JJ25900008}, author = {Jelinek, R. and Chmelka, B. F. and Wu, Y. and Davis, M. E. and Ulan, J. G. and Gronsky, R. and Pines, A.} } @proceedings {519, title = {Abelian and non-abelian holonomy in NMR interferometry}, journal = {Proc. of the Conference on Fundamental Aspects of Quantum Theory}, year = {1990}, publisher = {World Scientific Press}, author = {Pines, A. and Meuller, K.T.}, editor = {Anandan, J.} } @article {524, title = {Aluminum and Boron Nuclear-Quadrupole Resonance with a Direct-Current Superconducting Quantum Interference Device}, journal = {Journal of Chemical Physics}, volume = {93}, year = {1990}, note = {J Chem PhysEl294Times Cited:12Cited References Count:49}, month = {Dec 1}, pages = {7639-7646}, isbn = {0021-9606}, doi = {Doi 10.1063/1.459395}, url = {://WOS:A1990EL29400010}, author = {Connor, C. and Chang, J. and Pines, A.} } @article {592, title = {Assignment of Dipolar Couplings and Estimation of Conformational Probabilities in Partially Oriented Hexane}, journal = {Chemical Physics Letters}, volume = {137}, year = {1987}, note = {Chem Phys LettH6843Times Cited:19Cited References Count:19}, month = {May 29}, pages = {51-56}, isbn = {0009-2614}, doi = {Doi 10.1016/0009-2614(87)80303-2}, url = {://WOS:A1987H684300012}, author = {Gochin, M. and Zimmermann, H. and Pines, A.} } @article {653, title = {Analogy of Multiple-Quantum Nmr to Isotopic Spin Labeling}, journal = {Journal of the American Chemical Society}, volume = {103}, year = {1981}, note = {J Am Chem SocLk271Times Cited:43Cited References Count:40}, pages = {1613-1617}, isbn = {0002-7863}, doi = {Doi 10.1021/Ja00397a001}, url = {://WOS:A1981LK27100001}, author = {Warren, W. S. and Pines, A.} } @article {660, title = {Anisotropic Spin-Lattice Relaxation of Deuterated Hexamethylbenzene}, journal = {Journal of Magnetic Resonance}, volume = {41}, year = {1980}, note = {J Magn ResonKx294Times Cited:25Cited References Count:7}, pages = {389-394}, isbn = {1090-7807}, doi = {Doi 10.1016/0022-2364(80)90294-2}, url = {://WOS:A1980KX29400004}, author = {Tang, J. and Sterna, L. and Pines, A.} } @proceedings {683, title = {Application of novel NMR techniques to coal structure}, journal = {Coal Chemistry Workshop}, year = {1976}, pages = {229}, address = {Stanford}, author = {Wemmer, D. and Whitehurst, D. and Pines, A.} } @article {720, title = {Anisotropic Nuclear Spin Relaxation of C-13 in Solid Benzene}, journal = {Chemical Physics Letters}, volume = {16}, year = {1972}, note = {Chem Phys LettN8559Times Cited:53Cited References Count:17}, pages = {296-\&}, isbn = {0009-2614}, doi = {Doi 10.1016/0009-2614(72)80276-8}, url = {://WOS:A1972N855900018}, author = {Gibby, M. G. and Waugh, J. S. and Pines, A.} } @article {735, title = {Association of Dimethylformamide Molecules in Carbon Tetrachloride Solution}, journal = {Journal of the Chemical Society B-Physical Organic}, year = {1968}, note = {J Chem Soc BC0167Times Cited:47Cited References Count:14}, pages = {1110-\&}, doi = {Doi 10.1039/J29680001110}, url = {://WOS:A1968C016700007}, author = {Rabinovi, M. and Pines, A.} }